# Today I Learned

Some of the things I've learned every day since Oct 10, 2016

## 91: Categorical Distribution (Probability)

categorical distribution is one which describes a random variable which can take $k$ possible values, the probability of each possible outcome being known. For instance, the Bernoulli distribution is a special case of the categorical distribution, where $k = 2$ (one outcome being ‘success’, the other ‘failure’). The distribution of the outcomes of rolling a (not necessarily fair) 6-sided die would also be an example, with $k = 6$.